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134 lines
3.2 KiB
Markdown
134 lines
3.2 KiB
Markdown
# specs
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These are integration tests that execute the `deno` binary. They supersede the
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`itest` macro found in the `tests/integration` folder and are the preferred way
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of writing tests that use the `deno` binary.
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## Structure
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Tests must have the following directory structure:
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```
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tests/specs/<category_name>/<test_name>/__test__.json
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```
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## Test filtering
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To run a specific test, run:
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```
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cargo test specs::category_name::test_name
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```
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Or just the following, though it might run other tests:
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```
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cargo test test_name
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```
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To run showing the output of every test use `-- --nocapture` (note: this will
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cause tests to run sequentially instead of in parallel):
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```
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cargo test test_name -- --nocapture
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```
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## `__test__.json` file
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This file describes the test(s) to execute and the steps to execute. A basic
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example looks like:
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```json
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{
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"args": "run main.js",
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"output": "main.out"
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}
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```
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This will run `deno run main.js` then assert that the output matches the text in
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`main.out`.
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Or another example that runs multiple steps:
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```json
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{
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"tempDir": true,
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"steps": [{
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"args": "cache main.ts",
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"output": "cache.out"
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}, {
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"args": "run main.ts",
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"output": "error.out",
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"exitCode": 1
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}]
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}
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```
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Or if you want to run several tests at the same time:
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```json
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{
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"tests": {
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"ignore_dir": {
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"args": "run script.ts",
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"output": "script.out"
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},
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"some_other_test": {
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"args": "run other.ts",
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"output": "other.out"
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}
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}
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}
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```
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### Top level properties
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- `repeat` (number) - Number of times to repeat a test.
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- `tempDir` (boolean) - Copy all the non-test files to a temporary directory and
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execute the command in that temporary directory.
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- By default, tests are executed with a current working directory of the test,
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but this may not be desirable for tests such as ones that create a
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node_modules directory.
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### Step properties
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When writing a single step, these may be at the top level rather than nested in
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a "steps" array or "tests" object.
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- `args` - A string (that will be spilt on whitespace into an args array) or an
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array of arguments.
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- `output` - Path to use to assert the output or text (must end with an .out
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extension) _or_ text to pattern match against the output.
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- `flaky` - Step should be repeated until success a maximum of 3 times.
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- `if` (`"windows"`, `"linux"`, `"mac"`, `"unix"`) - Whether to run this step.
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- `exitCode` (number) - Expected exit code.
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### Auto-complete
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To get auto-complete for these files, add the following to a local
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`.vscode/settings.json` file:
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```json
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{
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"json.schemas": [{
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"fileMatch": [
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"__test__.jsonc"
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],
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"url": "./tests/specs/schema.json"
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}]
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}
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```
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## `.out` files
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`.out` files are used to assert the output when running a test or test step.
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Within the file, you can use the following for matching:
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- `[WILDCARD]` - match any text at the wildcard
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- `[WILDLINE]` - match any text on the current line
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- `[WILDCHAR]` - match the next character
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- `[WILDCHARS(5)]` - match any of the next 5 characters
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- `[UNORDERED_START]` followed by many lines then `[UNORDERED_END]` will match
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the lines in any order (useful for non-deterministic output)
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- `[# example]` - line comments start with `[#` and end with `]`
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